, if this proves to be unsatisfactory, you’ll need to see a specialist physiotherapist in running injuries.—Martin Haines, chartered physiotherapist and sports-injury specialist

Q Until two years ago I ran three times a week on woodland trails, but have recently joined colleagues for lunchtime runs, mainly on pavements. Since then I’ve experienced pain in both legs from just below my calf muscle to the Achilles tendon

at the moment, if you were ever to get any pain in your knee, it would be worth asking your GP to check for these possible problems at the same time.—Martin Haines, chartered physiotherapist and sports-injury specialist